# Epic Ruler vs Scala Architectural Scale

The clearest difference is review sentiment: Scala Architectural Scale at 87% against Epic Ruler's 0%. Scala Architectural Scale also leads on rating (4.6 vs 1.0) and update cadence (every 4 months vs every 17 months). Epic Ruler's advantage is in-app purchases (none vs 1). On price, ads and monetization model there is nothing between them.

Both are free to download. Scala Architectural Scale sells 1 one-off in-app purchase. Epic Ruler asks for nothing beyond the download.

Scala Architectural Scale holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Scala Architectural Scale has 25 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 0% of Epic Ruler's written reviews are positive against 87% of Scala Architectural Scale's.

Epic Ruler ships an update every 17 months, Scala Architectural Scale every 4 months. The most recent releases landed on August 11, 2026 and July 17, 2026 respectively.

## The numbers

| Metric | Epic Ruler | Scala Architectural Scale |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (4 ratings)](https://appshunter.io/ios/app/epic-ruler/id982728131/reviews) | **[4.6 (25 ratings)](https://appshunter.io/ios/app/scala-architectural-scale/id1090018333/reviews)** |
| Number of ratings | 4 | **25** |
| Positive reviews | 0.0% of reviews | **86.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 11 MB | 1 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chih-Hao Chen](https://appshunter.io/developer/618207820) | [Noerah Alvi](https://appshunter.io/developer/1088349320) |

## What reviewers say

### Epic Ruler

[App page](https://appshunter.io/ios/app/epic-ruler/id982728131)

Transform your smartphone into a portable measuring tool. Accurately measure lengths in both inches and centimeters directly from your device.

**Highlights:** Converts phone to ruler, Measures in inches, Measures in centimeters, Pocket-sized utility

**Features:** macOS Compatibility

**In-app purchases:** none


### Scala Architectural Scale

[App page](https://appshunter.io/ios/app/scala-architectural-scale/id1090018333)

This app allows users to measure printed architectural and engineering drawings directly on their device. It supports both known and unknown scales, offering fixed and variable scale options for precise measurements. Users can also select secondary units for quick conversions.

**Highlights:** Fixed and variable scale measurement, Supports unknown drawing scales, Secondary unit conversions (metric, decimal feet, feet/inches), Adjustable measurement precision, Extensive scale options for architectural, engineering, and metric drawings

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scala Full Version | $2.99 | one-time |


## Frequently asked questions

### Is Epic Ruler free?

Epic Ruler is free to download, with no in-app purchases.

### Is Scala Architectural Scale free?

Scala Architectural Scale is free to download, with in-app purchases available.

### Which has better reviews, Epic Ruler or Scala Architectural Scale?

Scala Architectural Scale is rated higher. Epic Ruler averages 1.0 out of 5 from 4 ratings, while Scala Architectural Scale averages 4.6 from 25 ratings.

### Do Epic Ruler or Scala Architectural Scale have ads?

Neither Epic Ruler nor Scala Architectural Scale shows ads.

### Which is updated more often, Epic Ruler or Scala Architectural Scale?

Epic Ruler ships an update every 17 months, and Scala Architectural Scale every 4 months. Most recently, Epic Ruler was updated on August 11, 2026 and Scala Architectural Scale on July 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*